Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a cabinet body capable of sensing an opening and closing state and a control method thereof, which can effectively solve the problems in the prior art.
The technical scheme of the invention is as follows:
a cabinet body capable of sensing an opening and closing state, wherein the cabinet body comprises a containing area and a baffle plate, and the baffle plate is used for opening or closing the containing area and comprises an RFID tag and an RFID reader;
The RFID tag comprises a radio frequency chip and a main antenna, wherein the main antenna and the radio frequency chip can be electrically connected, the main antenna is driven by the baffle to disconnect the radio frequency chip after the accommodating area is opened by the baffle, and the radio frequency chip is connected by the main antenna driven by the baffle after the accommodating area is opened by the baffle;
The RFID reader is configured to read data stored in the RFID tag, and the RFID tag is configured to: after the main antenna is disconnected from the radio frequency chip, the RFID reader cannot read the feedback data of the RFID tag, and after the main antenna is connected with the radio frequency chip, the RFID reader can read the feedback data of the RFID tag.
Further, the RFID tag comprises a first attachment area and a second attachment area, the radio frequency chip is attached to the first attachment area, the main antenna is attached to the second attachment area, and after the second attachment area and the first attachment area are close, the main antenna is connected to the radio frequency chip.
Further, the first attachment area is provided with a first contact, the second attachment area is provided with a second contact, the first contact is connected with the radio frequency chip, the second contact is connected with the main antenna, and after the second attachment area is close to the first attachment area, the first contact and the second contact abut against each other, so that the main antenna is connected to the radio frequency chip.
Further, the first attachment area is disposed in the baffle and moves along with the baffle, and the second attachment area is disposed in the accommodating area at a position where the baffle is closed.
Further, the RFID tag comprises a total attachment area, the main antenna and the radio frequency chip are respectively attached to the total attachment area, the total attachment area is provided with a V-shaped elastic piece, one end of the elastic piece is connected to the main antenna, the other end of the elastic piece is connected to the radio frequency chip, and after the elastic piece is compressed, the two ends of the elastic piece are connected so that the main antenna is connected to the radio frequency chip.
Further, the RFID tag is arranged in the accommodating area, and the baffle can be pressed tightly to enable the two ends of the elastic sheet to be connected after being closed.
Further, the RFID tag includes an electrical small loop connected to the radio frequency chip, and a read distance of the combination of the electrical small loop and the radio frequency chip is smaller than a distance between the radio frequency chip and the RFID reader.
Further, the carrier frequencies of the main antenna and the RFID reader are matched, so that the working frequency of the RFID tag is matched with the carrier frequency after the main antenna is connected with the radio frequency chip, and the working frequency of the radio frequency chip is not matched with the carrier frequency after the main antenna is disconnected from the radio frequency chip.
Further, the RFID tag is configured to: after the main antenna is disconnected from the radio frequency chip, the reading distance of the RFID tag is smaller than the distance between the RFID tag and the RFID reader, and after the main antenna is connected with the radio frequency chip, the reading distance of the RFID tag is larger than the distance between the RFID tag and the RFID reader.
A control method of a cabinet body capable of sensing an opening and closing state is based on any cabinet body capable of sensing the opening and closing state, and comprises the following steps:
periodically transmitting a carrier wave by the RFID reader;
and if the RFID reader reads the information returned by the RFID tag, judging that the corresponding accommodating area is in a closed state, and if the RFID reader does not read the information returned by the RFID tag, judging that the corresponding accommodating area is in an open state.
Accordingly, the present invention provides the following effects and/or advantages:
According to the application, the change of the read-write distance of the RFID tag is realized through the connection and disconnection of the main antenna and the radio frequency chip on the RFID tag, so that the RFID reader can read or not read the information needing to be fed back by the RFID tag, and whether the cabinet body is opened or closed is judged through whether the RFID reader has the information corresponding to the RFID tag read. The application reduces the communication unit, the infrared ray, the touch switch and other structures required by the prior cabinet body in the closed or open state, and can realize all the functions by only one RFID tag.
The RFID tag has two structures, one is that the main antenna is separated from the radio frequency chip, the main antenna and the radio frequency chip are disconnected and connected through the opening and closing of the cabinet body, and the other is that the main antenna and the radio frequency chip are integrated together but are not connected in a normal state, and the main antenna and the radio frequency chip are disconnected and connected through the opening and closing of the cabinet body.
It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.
Detailed Description
For the convenience of understanding by those skilled in the art, the structure of the present invention will now be described in further detail with reference to the accompanying drawings: it should be understood that, in this embodiment, the steps mentioned in this embodiment, unless specifically stated otherwise, may be performed in any order, simultaneously or partially simultaneously,
Referring to fig. 1-2, a cabinet capable of sensing an open-close state comprises a containing area 1 and a baffle 2, wherein the baffle 2 is used for opening or closing the containing area 1.
In this embodiment, the cabinet may comprise a plurality of receiving areas 1, each receiving area 1 is provided with a baffle 2, wherein the baffles 2 are connected to the receiving areas 1 in a hinged manner, so that the receiving areas 1 are exposed by the openable baffles 1 to open or close the receiving areas. In other embodiments, the cabinet body may also be a drawer structure, so that a drawer is provided in each accommodation area 1, and the outer surface of the drawer is provided with the baffle 2, so that the baffle 2 can be opened or closed to the accommodation area 1 in a drawer connection manner.
Including an RFID tag 3 and an RFID reader (drawn);
The RFID tag includes a radio frequency chip 301 and a main antenna 302, where the main antenna 302 and the radio frequency chip 301 may be electrically connected, after the accommodating area 1 is opened by the baffle 2, the main antenna 302 is driven by the baffle 2 to disconnect the radio frequency chip 301, and after the accommodating area 1 is opened by the baffle 2, the radio frequency chip 301 is connected by the main antenna 302 driven by the baffle 2;
In this embodiment, a structure in which a main antenna and a radio frequency chip of a conventional RFID tag are fixedly electrically connected is changed to a structure in which the main antenna 302 and the radio frequency chip 301 are electrically connectable, that is, the main antenna 302 and the radio frequency chip 301 are connected together under a certain condition, and the main antenna 302 and the radio frequency chip 301 are disconnected under another condition. The antenna of the RFID is used for transmitting or receiving the carrier wave transmitted by the RFID reader, so as to couple the energy carried by the carrier wave and provide the energy to the radio frequency chip, and the radio frequency chip transmits the data stored by itself through the antenna, that is, the main antenna 302 of the present application is used for matching with the carrier wave transmitted by the RFID reader, so as to be capable of receiving the carrier wave and transmitting the data signal wave. The travelling wave is transmitted as much as possible on the feed line of the antenna, so that the energy incident on the antenna from the feed line is not reflected by the antenna and radiates out as much as possible. On the one hand, the chip starting circuit of the radio frequency tag starts to work, and enough energy needs to be obtained in the electromagnetic field generated by the RFID reader through the main antenna; on the other hand, the main antenna determines the communication channel, communication scheme, and communication distance between the RFID tag and the reader/writer.
The RFID reader is configured to read data stored in the RFID tag 3, and the RFID tag 3 is configured to: after the main antenna 302 is disconnected from the radio frequency chip 301, the RFID reader cannot read the feedback data of the RFID tag 3, and after the main antenna 302 is connected with the radio frequency chip 301, the RFID reader can read the feedback data of the RFID tag 3.
Alternatively, in order to implement the above technique, the RFID tag 3 may be configured to: after the main antenna 302 is disconnected from the radio frequency chip 301, the reading distance of the RFID tag 3 is smaller than the distance between the RFID tag 3 and the RFID reader, and after the main antenna 302 is connected with the radio frequency chip 301, the reading distance of the RFID tag 3 is larger than the distance between the RFID tag 3 and the RFID reader.
In the design of the antenna, the input impedance of the antenna in a specified size range and a working environment part is conjugated and matched with the chip in a working frequency band. In addition to antenna impedance matching design, parameters such as antenna radiation efficiency, polarization direction and radiation pattern are also of concern. The reading distance of the RFID tag 3 depends on the data of the operating frequency, the operating wavelength, and the like of the main antenna 302. If the RFID tag 3 is able to acquire energy in the carrier wave and the energy radiated outward by the main antenna 302 of the RFID tag 3 is sufficient to be captured by the RFID reader, the distance between the RFID reader and the RFID tag 3 is satisfied or smaller than the reading distance of the RFID tag 3. When the main antenna 302 is disconnected from the rf chip 301, the rf chip 301 may not be able to obtain the energy in the carrier wave, so that the reading distance becomes 0m, or the rf chip 301 may obtain the energy in the carrier wave, but due to the lack of the main antenna 302, the rf chip 301 can radiate the data signal only at a very short distance, so that the reading distance is very short, for example, 0.1 m. When the main antenna 302 is disconnected from the radio frequency chip 301, the reading distance of the RFID tag 3 cannot satisfy the distance between the RFID reader and the RFID tag 3, and the RFID reader cannot read the data stored in the RFID tag 3.
Optionally, the carrier frequencies of the main antenna 302 and the RFID reader are matched, so that the working frequency of the RFID tag 3 is matched with the carrier frequency after the main antenna 302 is connected to the radio frequency chip 301, and the working frequency of the radio frequency chip 301 is not matched with the carrier frequency after the main antenna 302 is disconnected from the radio frequency chip 301.
In other embodiments, to implement the above technique, the RFID tag 3 may also be configured to: the main antenna 302 is matched with the frequency of the carrier wave transmitted by the RFID reader, but the electric small loop is not matched with the frequency of the carrier wave transmitted by the RFID reader, so that when the main antenna 302 is disconnected with the radio frequency chip 301, the energy in the coupling carrier wave of the main antenna 302 cannot be transferred to the radio frequency chip 301, and thus the radio frequency chip 301 cannot start to work, so that the reading distance of the RFID tag 3 cannot meet the distance between the RFID reader and the RFID tag 3, and the RFID reader cannot read the data stored in the RFID tag 3.
Further, referring to fig. 3, the RFID tag 3 includes a first attachment area 303 and a second attachment area 304, the radio frequency chip 301 is attached to the first attachment area 303, the main antenna 302 is attached to the second attachment area 304, and after the second attachment area 304 and the first attachment area 303 are close, the main antenna 302 is connected to the radio frequency chip 301.
Further, the first attachment area 303 is provided with a first contact 306, the second attachment area 304 is provided with a second contact 307, the first contact 306 is connected to the radio frequency chip 301, the second contact 307 is connected to the main antenna 302, and after the second attachment area 304 and the first attachment area 303 are close to each other, the first contact 306 and the second contact 307 abut against each other, so that the main antenna 302 is connected to the radio frequency chip 301.
In this embodiment, the first attachment area 303 and the second attachment area 304 may be made of a circuit board, a plastic board, or the like, and in order to achieve connection between the first contact 306 and the radio frequency chip 301, the second contact 307 is connected to the main antenna 302, and conductive wires or connection lines may be respectively disposed in the first attachment area 303 and the second attachment area 304, so that the first contact 306 is electrically connected to the radio frequency chip 301, and the second contact 307 is electrically connected to the main antenna 302. Referring to fig. 4, when the first contact 306 and the second contact 307 are abutted, the first contact 306 and the second contact 307 are electrically conducted, so that the main antenna 302 is connected to the radio frequency chip 301.
Further, the first attachment area 303 is disposed on the baffle 2 and moves along with the baffle 2, and the second attachment area 304 is disposed on the accommodating area 1 corresponding to the closed position of the baffle 2.
Referring to fig. 2, in the present application, the radio frequency chip 301 and the main antenna 302 are respectively disposed on the cabinet body through the first attachment area 303 and the second attachment area 304, so that the radio frequency chip 301 is disposed on the baffle 2 and moves along with the baffle 2. When the shutter 2 is opened, the main antenna 302 is away from the radio frequency chip 301, so that the main antenna 302 is disconnected from the radio frequency chip 301, at which time the characteristics of the RFID tag 3 change, e.g. the reading distance of the RFID tag 3 is smaller than the distance between the RFID tag 3 and the RFID reader. When the shutter 2 is closed, the main antenna 302 is brought close to the radio frequency chip 301, so that the main antenna 302 is connected to the radio frequency chip 301, and at this time, the characteristics of the RFID tag 3 change, for example, the reading distance of the RFID tag 3 is larger than the distance between the RFID tag 3 and the RFID reader. Thereby realizing the change of whether the RFID reader reads the RFID tag 3 or not.
Further, referring to fig. 3, the RFID tag 3 includes an electrical small loop 305, the electrical small loop 305 is connected to the radio frequency chip 301, and the reading distance of the combination of the electrical small loop 305 and the radio frequency chip 301 is smaller than the distance between the radio frequency chip 301 and the RFID reader.
The arrangement of the electrical small loop 305 can enable the radio frequency chip 301 and the components thereof to change the inductance value of the main antenna 302, so that the main antenna 302 is better conjugated and matched with the RFID reader after being connected with the radio frequency chip 301. Meanwhile, the electric small ring 305 can enable the radio frequency chip 301 to achieve short-distance reading, and can be used for manually holding another RFID reader to conduct closer reading, so that reading can be achieved under the condition that the main antenna 302 is damaged or cannot be connected to the radio frequency chip 301.
A control method of a cabinet body capable of sensing an opening and closing state comprises the following steps:
S1, periodically transmitting a carrier wave through the RFID reader;
in the step, the carrier wave is sent once every 5s through the antenna of the RFID reader, and the frequency and the wavelength of the carrier wave can be conjugated with the main antenna, so that the main antenna can realize the work such as energy coupling under the carrier wave.
S2, if the RFID reader reads the information returned by the RFID tag, the corresponding accommodating area is judged to be in a closed state, and if the RFID reader does not read the information returned by the RFID tag, the corresponding accommodating area is judged to be in an open state.
In this step, if the radio frequency tag is connected to the main antenna, the RFID tag may receive the energy of the carrier wave and start the radio frequency chip to operate, and after the radio frequency chip operates, the data stored in one radio frequency chip will be returned, for example, id=001 of the accommodating area is stored in the radio frequency chip, and the data generates a certain electric wave through the main antenna and is emitted. And then receiving electric waves sent by the main antenna through the antenna of the RFID reader, if the RFID reader reads the information 001 returned by the RFID tag, the main antenna and the radio frequency chip are considered to be connected together and can work normally, the corresponding accommodating area is judged to be in a closed state, and if the RFID reader does not read the information returned by the RFID tag, the main antenna and the radio frequency chip are considered to be disconnected and cannot work normally, the corresponding accommodating area is judged to be in an open state.
Further comprising the steps of:
and S3, if the RFID reader does not read the information returned by the RFID tag for a plurality of continuous periods, an alarm is sent out.
If the information returned by the RFID tag is not read in a plurality of continuous reading periods, the baffle of the cabinet body is considered to be not closed, and an alarm can be sent to require a worker to close.
Example two
This embodiment is substantially the same as the first embodiment except that:
Further, referring to fig. 5, the RFID tag 3 includes a total attachment area 308, the main antenna 302 and the radio frequency chip 301 are attached to the total attachment area 308, the total attachment area 308 is provided with a V-shaped elastic sheet 309, one end of the elastic sheet 309 is connected to the main antenna 302, the other end of the elastic sheet 309 is connected to the radio frequency chip 301, and after the elastic sheet 309 is pressed, two ends of the elastic sheet 309 are connected to connect the main antenna 302 to the radio frequency chip 301.
In the present embodiment of the present invention,
The main antenna 302 and the radio frequency chip 301 are attached to the total attachment area 308, respectively, while the main antenna 302 and the radio frequency chip 301 are not connected on the total attachment area 308. Then, by means of the elastic sheet 309, the main antenna 302 and the radio frequency chip 301 are disconnected under the condition of no stress. Then, after the spring 309 is compressed, two ends of the spring 309 are connected so that the main antenna 302 is connected to the rf chip 301. Thereby enabling the switching on or off of the main antenna 302 and thus enabling a change in the characteristics of the RFID tag.
Further, the RFID tag 3 is disposed in the accommodating area, and the baffle 2 may be closed to press the elastic sheet 309 to connect two ends of the elastic sheet 309.
Other structures and principles of the present embodiment are the same as those of the first embodiment.
It should be noted that in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The use of the words first, second, third, etc. do not denote any order. These words may be interpreted as names.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms should not be understood as necessarily being directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.